7 results about "Chemical corrosion" patented technology

The present invention provides a preparation method for a light-heat dual-cured woodware UV varnish coating. The method comprises: uniformly mixing an acrylic acid monomer, a catalyst and a polymerization inhibitor; adding the resulting mixture to epoxy resin with a temperature of 90-120 DEG C to carry out a reaction at a certain temperature; adopting acid value detecting to monitor the extent of the reaction, wherein the epoxy acrylate (EA) is obtained when the acid value is reduced to less than 5 mg/g; adding a thermal initiator, a photoinitiator, an antifoaming agent, a wetting and dispersing agent, a thickening agent and a leveling agents to the EA, then mixing and stirring to obtain the UV varnish coating. The prepared UV varnish coating through the method provided by the present invention has the dual functions of light curing and heat curing, the surface dry can be rapidly achieved in 4-8 seconds under the light intensity of 250-400 mJ/cm<2>, the film forming and the curing can be achieved in 1-5 hours at the temperature of 50-70 DEG C. In addition, the prepared UV varnish coating has characteristics of high adhesion, good chemical corrosion resistance, high film hardness and low cost, and provides more excellent construction performance, curing method and film performance than ordinary UV-cured coatings.

The invention discloses a flame-retardant and wear-resisting rubber material for a borehole cable sheath and a preparation method of the flame-retardant and wear-resisting rubber material. The flame-retardant and wear-resisting rubber material is prepared from nitrile rubber, natural rubber, triethyl citrate, benzoxazine resin, magnesium dimethacrylate, acetyl benzoyl peroxide, ethanol [2-[2-(2-methoxyethoxy)ethoxy]ethyl], triester with boric acid, gamma-aminopropyltriethoxysilane, polychlorinated terphenyl, dimethyldiethoxysilane, tricresyl phosphate, magnesium hydroxide, white jade powder, microcrystalline wax, hydrogenated rosin resin and the like. By matching the nitrile rubber with the natural rubber for use, the flame-retardant and wear-resisting rubber material has the advantages of good mechanical property and processing property, good oil resistance, wear resistance and chemical corrosion resistance, as well as heat resistance and low temperature resistance; by matching the tricresyl phosphate, the polychlorinated terphenyl and the magnesium hydroxide with sodium aluminum carbonate hydroxide for use, the fire-retardant property is enhanced; by adding the white jade powder, nano- tungsten boride and other fillers, high temperature resistance, wear resistance and other physical properties of the material are enhanced.

The invention discloses concrete for a prefabricated part and a preparation method thereof, which relate to the technical field of concrete, and solve the problems that harmful substances such as acidand alkali ions are easy to permeate inwards through tiny gaps and cracks of the concrete, so that the volume of a steel bar is expanded, and the prefabricated part is damaged. The concrete for a prefabricated part comprises the following components in parts by weight: 180-200 parts of Portland cement, 170 to 180 parts of water, 720 to 760 parts of medium sand, 1020 to 1050 parts of broken stone,70 to 80 parts of fly ash, 170 to 190 parts of mineral powder, 3 to 5 parts of a water reducing agent, 2 to 3 parts of a retarder, 4 to 8 parts of an anti-permeability agent, 6 to 10 parts of methylsodium silicate, 5 to 9 parts of triethoxysilane, and 15 to 35 parts of organic silicon water-soluble resin. The concrete for the prefabricated part has excellent chemical corrosion resistance, has agood protection effect on steel bars in the prefabricated part, and is good in overall application effect.

The invention discloses a preparation method of a compound modified electrode for simultaneously detecting lead and cadmium ions. The preparation method comprises the following steps: preparing graphene; preparing nano graphene; preparing micro-nano carbon spheres; synthesizing a micro-nano carbon sphere, nano graphene and naphthol compound modification liquid; modifying a working electrode based on a micro-nano carbon sphere, nano graphene and naphthol compound modification liquid; and simultaneously detecting heavy metal lead ions and cadmium ions. When the modified electrode manufactured by the method is applied to a sensor, the simultaneous sensitive detection of heavy metal lead ions and cadmium ions with similar potentials is realized, the detection sensitivity and the detection speed can be effectively improved, and the detection limit is far lower than the minimum content requirement of the heavy metal lead ions and cadmium ions in drinking water; and the compound modified electrode is simple in structure, low in energy consumption, raw material cost, process cost and labor cost, excellent in mechanical property and chemical corrosion resistance, and capable of achieving the effects of saving energy, reducing emission, treating environmental pollution and guaranteeing life health, and the whole detection system is convenient to achieve miniaturization and automation.

The invention relates to a metal barrier layer, which is a film layer containing at least one active metal ion of Ca, Mg, Al, Mn, Zn, Cr, Fe, Ni, Sn, Sb and Bi, wherein the thickness of the metal barrier layer is 1-30 nm, and the metal barrier layer has light transmission. The invention further discloses a perovskite solar cell using the metal barrier layer, and a preparation method of the perovskite solar cell. According to the invention, the metal barrier layer effectively prevents the metal on the upper layer from permeating to the lower layer to react with perovskite, delays the decomposition of the perovskite film, effectively reduces the chemical corrosion of perovskite to the top metal back electrode, improves the stability of the solar cell, and solves a technical problem that the perovskite solar cell is lower in stability in the air.

The invention discloses a beryllium silicate glass. The beryllium silicate glass comprises, by mass, 42-49% of SiO2, 15-20% of BeO, 11-14% of Na2O, 5-10% of Al2O3, 3-6.5% of oxide of at least one transition element, 3-6.5% of at least one rare earth element oxide, 3-6.5% of UO2, and 5-8% of HfO2. The glass has an extremely high stability, an extremely good mechanical strength and an extremely high chemical corrosion resistance to radiation, and can well seal, preserve and isolate a waste liquid under a reduced size condition.